| 0x00000000 ~ 0x000000FF | Pad |
|---|---|
| 0x00000100 ~ 0x000001FF | HuC6230 (SoundBox) |
| 0x00000200 ~ 0x000002FF | HuC6271 (RAINBOW) |
| 0x00000300 ~ 0x000003FF | HuC6261 (NEW Iron Guanyin) |
| 0x00000400 ~ 0x000004FF | HuC6270-A (7up) |
| 0x00000500 ~ 0x000005FF | HuC6270-B (7up) |
| 0x00000600 ~ 0x000006FF | HuC6272 (KING) |
| 0x00000700 ~ 0x000007FF | Unknown (ExBusReset?) |
| 0x00000C00 ~ 0x00000CFF | Backup Memory Control |
| 0x00000E00 ~ 0x00000EFF | Interrupt controller |
| 0x00000F00 ~ 0x00000FFF | Timer |
| 0x00500000 ~ 0x005FFFFF 0x80500000 ~ 0x805FFFFF | HuC6273 (Aurora) |